[Qemu-devel] [PATCH v6] ppc: Fix duplicated typedefs to be able to compile with Clang in gnu99 mode

[Thomas Huth <thuth@redhat.com>]

When compiling the ppc code with clang and -std=gnu99, there are a
couple of warnings/errors like this one:

  CC      ppc64-softmmu/hw/intc/xics.o
In file included from hw/intc/xics.c:35:
include/hw/ppc/xics.h:43:25: error: redefinition of typedef 'ICPState' is a C11 feature
      [-Werror,-Wtypedef-redefinition]
typedef struct ICPState ICPState;
                        ^
target/ppc/cpu.h:1181:25: note: previous definition is here
typedef struct ICPState ICPState;
                        ^
Work around the problems by including the proper headers in spapr.h
and by using struct forward declarations in cpu.h.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 As discussed on IRC, Cédric's patches likely should go via David's ppc-
 tree, so I'll go with this version here for my gnu99-PULL request.
 (v6: Don't use #includes in cpu.h, use forward struct definitions instead)

 include/hw/ppc/spapr.h      | 5 +++--
 include/hw/ppc/spapr_xive.h | 2 --
 target/ppc/cpu.h            | 9 +++++----
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 9e01a5a..a947a0a 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -8,15 +8,16 @@
 #include "hw/mem/pc-dimm.h"
 #include "hw/ppc/spapr_ovec.h"
 #include "hw/ppc/spapr_irq.h"
+#include "hw/ppc/spapr_xive.h"  /* For sPAPRXive */
+#include "hw/ppc/xics.h"        /* For ICSState */
 
 struct VIOsPAPRBus;
 struct sPAPRPHBState;
 struct sPAPRNVRAM;
+
 typedef struct sPAPREventLogEntry sPAPREventLogEntry;
 typedef struct sPAPREventSource sPAPREventSource;
 typedef struct sPAPRPendingHPT sPAPRPendingHPT;
-typedef struct ICSState ICSState;
-typedef struct sPAPRXive sPAPRXive;
 
 #define HPTE64_V_HPTE_DIRTY     0x0000000000000040ULL
 #define SPAPR_ENTRY_POINT       0x100
diff --git a/include/hw/ppc/spapr_xive.h b/include/hw/ppc/spapr_xive.h
index 7fdc250..9bec919 100644
--- a/include/hw/ppc/spapr_xive.h
+++ b/include/hw/ppc/spapr_xive.h
@@ -41,8 +41,6 @@ bool spapr_xive_irq_claim(sPAPRXive *xive, uint32_t lisn, bool lsi);
 bool spapr_xive_irq_free(sPAPRXive *xive, uint32_t lisn);
 void spapr_xive_pic_print_info(sPAPRXive *xive, Monitor *mon);
 
-typedef struct sPAPRMachineState sPAPRMachineState;
-
 void spapr_xive_hcall_init(sPAPRMachineState *spapr);
 void spapr_dt_xive(sPAPRMachineState *spapr, uint32_t nr_servers, void *fdt,
                    uint32_t phandle);
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 486abaf..a62ff60 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -1177,8 +1177,9 @@ do {                                            \
 
 typedef struct PPCVirtualHypervisor PPCVirtualHypervisor;
 typedef struct PPCVirtualHypervisorClass PPCVirtualHypervisorClass;
-typedef struct XiveTCTX XiveTCTX;
-typedef struct ICPState ICPState;
+
+struct XiveTCTX;
+struct ICPState;
 
 /**
  * PowerPCCPU:
@@ -1197,8 +1198,8 @@ struct PowerPCCPU {
     int vcpu_id;
     uint32_t compat_pvr;
     PPCVirtualHypervisor *vhyp;
-    ICPState *icp;
-    XiveTCTX *tctx;
+    struct ICPState *icp;
+    struct XiveTCTX *tctx;
     void *machine_data;
     int32_t node_id; /* NUMA node this CPU belongs to */
     PPCHash64Options *hash64_opts;
-- 
1.8.3.1